Clamp for buzz-saws.



J. RUSSELL. CLAMP FOR. BUZZ 'sAws. APlLIOATION FILED JULY 23, 1910.

985,209. Patnted Feb. 28, 1911.:

Eif- 1;

I wverribrQ JOSEPH RUSSELL, OF BUSWELL, WISCONSIN.

CLAMP FOR BUZZ-SAWS.

Specification of Letters Patent. Application filed July 23, 1910.

Patented Feb. 28, 1911. Serial No. 573,400.

To all whom it may concern".

Be it known that I, Josnrir RussnLL, a citizen of the United States,residing at Buswell, county of Vilas, and State of VVisconsin, haveinvented new and useful Improvements in Clamps for Buzz-Saws, of whichthe following is a specification.

My invention relates to improvements in devices for clamping and holdingbuzz saws while being sharpened or set.

The object of my invention is to provide a simple and convenient clampfor holding a buzz saw by which the saw is not only rigidly held in aconvenient position to be sharpened and set, but also by which the sawis quickly and easily released, revolved on its central support, andreadjusted from time to time, as the teeth are being put in order, andalso by which the central support is readily adjusted higher or lower asmay be required for holding saws of greater or less diameter.

My invention is further explained by reference to the accompanyingdrawings, in which- Figure 1 represents a vertical section, and Fig. 2 afront view thereof in connection with the side of the supporting bench,and Fig. 3 is a horizontal section, drawn on line of Fig. 1.

Like parts are identified by the same reference numerals throughout theseveral views.

The clamp comprises the vertical member 1 and the inclinable member 2between which the buzz saw 3 is revolubly supported on the trunnion 4.The members 1 and 2 are pivotally connected together at their lower endsby the bolt 5 and said members are drawn toward each other in positionto hold the saw by the bolt 6 and spiral spring 7. The bolt 6 isslidably supported from the members 1 and 2 in apertures 8 and 9. Thespring 7 is interposed between the vertical member 1 and the nut 10, andthe tension on said spring is increased or diminished by turning the nut10 forwardly or backwardly on the bolt, whereby the desired tension isproduced on said spring for rigidly holding the saw 3 in place as it isbeing sharpened or set. The clamping member 2 is preferably providedwith a plurality of contact bearings 11, which are adapted to bearagainst the saw and coiiperate with the opposing clamping member inholding the saw in place. 12 is an eccentric lever which is pivotallysupported from the clamping member 9 on the pivotal bolt 13 and the saidlever is so shaped that when brought to the vertical position' shown inFigs. 1 and 2, said clamping members are free to be drawn toward eachother and against the saw by the recoil of said spiral spring 7. When,however. it is desirous to readjust the saw, the upper arm of said leveris moved downwardly, whereby its opposite end 12 is brought in contactwith the opposing clamping member 1, whereby the upper ends of saidclamping members are separated, said saw is released, and free to bereadjusted. Thus it is obvious that said saw is readily released,preparatory to be readjusted from time to time, as the teethare beingsharpened or set by simply bearing down upon the long arm of the lever12, while said clamping members 1 and 2 are brought toward each otherand said saw is clamped by the reverse movement of said lever.

It will be understood that when sharpening or setting saws of greater orless diame ter, it becomes necessary to adjust the saw supportingtrunnion to correspond with the diameter of such saw. In view of thisfact, I have provided the trunnion supporting member 1 with the verticalslot 1 1, for the reception of said trunnion and a vertical recess 15,for the reception of the collar 16, and said trunnion a is provided uponone side of said member 1 with the hand nut 17 and a washer 18, wherebywhen said hand nut is turned back on said trunnion it is freeto beraised or lowered when it is retained at any desired point of adjustmentby turning forward said hand nut on said trunnion. It will also beunderstood that when said hand nut 17 is turned forward on saidtrunnion, that portion of the member 2 upon the respective sides of theslot 14 is securely clamped by and between the collar 16 and a washer18, whereby said trunnion is rigidly retained at any desired point ofadjustment in said slot.

19 is a bench to the side of which the clamping members 1 and 2 aresecured and by which they are retained in their proper vertical positionfor use.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. In a device otthe described class, the combination of two clampingmembers pivotally connected together at their lower ends and providednear their upper ends with an aperture tor-"the reception of a clampingbolt,a clamping bolt supported in said aperitures, a spiralspringinterposed between one combination of two clamping members pivotof saidclamping members and a bearing, on one end of said bolt and adaptedbyits recoil .to draw said clamping members together, 'a'trunnion'adapted to revolubly support a sawt'rom oneof said clamping members, aneccentric lever pivotally connected with the opposing clamping memberand adapted as it is moved in one direction, to separate said clampingmembers, and when moved in the opposite direction, to permitsaid'members to bedrawn together by the, recoil of said spring.

2. Inna" device of the described class the ally" connected together attheir lower ends andprovided near their upperends with an aperture forthe reception of a clamping bolt, 1 i' a clampmg bolt supported 111 saidapertures, a spiral sprmg interposed between one ofsaidclamping membersand a bearing on one end of said bolt and adapted by its recoil to-drawsaid clam in members vto ether 'means for increasing and diminishing thetension of said" spring, a trunnion adapted to revolubly support a sawfrom'one of said clamping members, an eccentric lever pivotally,connected, wlththe opposlte clampmg member and adapted as it is moved inone direction, to separate said clamping members, andwhen moved in theopposite direction to permit said members to be drawn together by therecoil of said s ring.

3. In a' device of the descri ed class, the combination of two clampingmembers pivotally connected together at their lower ends and providednear their upper ends with an aperture for the reception of a clampingbolt, a clamping bolt supported in said apertures, .a spiral springinterposed between one of said clamping members and a bearing on one endof said bolt and adapted by its recoil to draw said clamping memberstogether,

means for increasing and diminishing the tension of said spring, atrunnion ad u-stably supported from one of said clamping members adaptedto rev-olubly support a saw,

Copies :of this patent may be obtainediforrfive cents each, byaddressingthe Commissioner of Patents,

" I W Washington, D. C.

